Interesting analogy but the reality is that companies really don't invest enough time defining exactly what they want a role to achieve and the behaviours and skills they need candidates to have to excel in the role. I also agree that so many companies have one way of interviewing or assessing candidates no matter how junior or senior the role is. I am always shocked when clients tell me they will be setting an hour aside to interview candidates to fill one of their critical Board roles following which a decision will be made! Of course we don't let that happen but left to their own devices they would. 

Recruiting employees is an investment in the most important capital you can acquire for your business and should be treated as such. When did you hear of a manufacturing business buying a new £2 million production line when they didn't know what they needed the technology to do and set aside an hour to make the decision? It doesn't happen!!